Thirsk was perhaps the most important figure to represent York in Henry VI’s Parliaments. A wool merchant, he served several spells as mayor of the Calais staple during a crucial period of the Wars of the Roses and, as such, he emerged in the 1460s as an important supporter of the Yorkist regime. His origins, however, are obscure. He may have been related to the fuller William Thresk who purchased the freedom of the city in 1379-80, or to another William, a tailor, who was admitted in similar fashion in 1403. Robert Thresk, the son of the latter, entered the freedom by patrimony in 1412-13. John, for his part, was evidently not a son of a freeman, for he had to purchase the freedom in 1427, probably on the occasion of his marriage to Christine, the sister of the wealthy stapler, Richard Russell, who before his death in 1435 appointed Thirsk as one of his executors.
The marriage also guaranteed Thirsk an early entry into York’s governing elite. He was appointed as one of the city’s chamberlains in February 1433, and further office followed quickly. In September 1435 he was chosen sheriff, and as such he was called upon in November to purvey goose feathers for the making of arrows in anticipation of the defence of Calais from Burgundian attack. In the following month he was also charged with collecting the parliamentary subsidy in the city. It is likely that he already had a personal interest in Calais affairs, following his brother-in-law by becoming a merchant of the staple, although the extent of his commercial activities at this point is obscure. By this stage of his career he had not amassed any great wealth and he was assessed at only £5 p.a. towards the parliamentary subsidy he had been authorized to collect.
Despite the letters patent exempting him from civic office, Thirsk was soon once again playing a full part in York’s affairs. In January 1447 he again attested the parliamentary election; two months later he served on a commission of oyer and terminer; in February 1448 he was named to a commission to deliver the city’s gaol, and in July he was among the aldermen commissioned to inquire into allegations of treason made against John Marton. On 20 Jan. 1449 Thirsk was present in the council chamber to witness his own election to the Parliament summoned to assemble at Westminster the following month. He was returned alongside another wealthy York stapler and then mayor, John Karr*.
Like many other York staplers, Thirsk was intricately involved in the financial transactions between the Calais merchants and the English Crown. On 20 Oct. 1449 the King agreed that for a term of four years the staplers might ship specified quantities of wool and woolfells without paying customs until satisfied of the sum of £10,700 owing to them from the Crown. Thirsk, Karr and Richard Lematon* were allowed to recover a total of £315 12s. from customs due at Kingston-upon-Hull; and in March the following year Thirsk, acting with other Yorkshire and Lincolnshire merchants, was licensed to recover his part of the £800 lent for the despatch to Calais of a force under Ralph, Lord Sudeley. Part of this sum, £157 16s., was still outstanding in October 1454, and they then received new licences to ship wool free of customs from Hull.
Throughout the early 1450s Thirsk remained active in civic affairs while becoming increasingly involved in the concerns of the Calais staple. In May 1452 he was named to a commission of gaol delivery, and in February the following year he again attested the parliamentary election. The spring of 1454 saw him commissioned to levy a loan of 100 marks from the city to equip a force to protect the Narrow Seas and the English Channel for English shipping, while the following month he was arresting vessels in Hull to fit out the fleet. The loan of 100 marks was duly collected and, because of the urgency of the situation, delivered not to the Exchequer in Westminster but to the merchants, Richard Anson* and John Acclom*, acting on behalf of the fleet’s commanders, the earls of Salisbury, Worcester and Wiltshire. Thirsk and his fellow collector, the alderman John Shirwode, then received repayment of the loan from the custom collectors in Hull, according to the provision made in the Parliament of the previous year. Nevertheless, the barons of the Exchequer began proceedings against them for the 100 marks and it was not until 26 Oct. 1458 that the King sent a privy seal writ ordering them to stop process.
The personal intervention of the King in this potentially troublesome business may have reflected Thirsk’s increasing importance in national affairs. By May 1456, when provision was made for the repayment of further loans from merchants of the staple totalling £2,000, he had become mayor of the staple in succession to Robert White*.
The staplers’ sympathies for the Yorkist lords and in particular for the captain of Calais, the earl of Warwick, were perhaps inevitable given the importance of the town and marches to the prosperity of their own trade and the prospects of recovering their loans to the Crown. In May 1458 Thirsk had been appointed to an embassy, led by Warwick, to treat with the duke of Burgundy. Along with other staplers, he advanced £846 6s. 8d. to meet its costs and received a licence to ship wool free of customs to recover the sum.
Nevertheless, there is no suggestion that Thirsk had fallen foul of the new Yorkist rulers: indeed, he soon began to play his part in the establishment of Yorkist rule in the north. In May 1461 he was named to a commission of oyer and terminer to inquire into treasons committed by John Morton (the future archbishop of Canterbury). A year later, Edward IV intervened directly in the election of the new mayor of York. The details of the supposed obstruction of the election by the commons of the city are obscure, but Edward ordered the citizens to elect Thirsk to the office, and wrote to them on 3 Mar. 1462 to thank them for confirming Thirsk’s appointment and remind them of their duty to be obedient to him. The writ was at pains to emphasize Thirsk’s reluctance to take on the office (‘he hath take upon him full sore agenst his wyll, sauf only at the pleaser of us’), and Thirsk appears indeed to have been in London when Edward intervened, forcing the aldermen to send Christopher Berwick to escort the new mayor back to York. During this, his second mayoralty, Thirsk organized the city’s contingent to serve with the earl of Warwick in suppressing the Lancastrian strongholds in Northumberland and in November also welcomed the King himself to the city.
Thirsk’s reluctance to serve as mayor of York in 1462-3 may have owed something to his continued preoccupation with the affairs of the Calais staple. With Edward IV’s accession, the staplers’ relationship with the Crown became closer than it had ever been. The merchants continued to lend large sums not only to meet the costs of the Calais garrison, but also to pay for the royal household and the campaigns in the north of England. By April 1463 the outstanding loans totalled some £32,861 and in January 1465 terms for their repayment from the wool customs were agreed in Parliament.
Thirsk’s election to the Parliament that assembled at Westminster on 3 June 1467 was clearly connected to the parliamentary confirmation of the agreement made between the King and the staplers in the previous year. He attended the Parliament, which lasted until 7 June 1468, for a total of 54 days ‘ad diversas vices’, ten days more than his colleague, John Marshall†. His activity in promoting York’s interests is in evidence in gifts of 6s. 8d. to the usher and clerk of Parliament, as well as to several of the King’s serjeants-at-arms.
Nevertheless, in April 1469 Thirsk was replaced as mayor of the Calais staple by his former lieutenant, John Prout.
Given his prominence in local and national affairs, surprisingly little is known of Thirsk’s private concerns. Despite his standing in the Company of the staple he does not appear to have been a major exporter of wool during the 1460s, although he did continue until his death to ship various other commodities, including woad, iron, corn and alum from Kingston-upon-Hull.
Thirsk himself died on 5 Apr. 1473, the date from when his successor as mayor of the staple, Thomas Grantham†, rendered account as treasurer and victualler of Calais.
